.index-banner-box{
    width: 100%;
    height: 100vh;
    display: block;
    position: relative;
    overflow: hidden;
}
.index-banner-box,
.index-banner-img,
.index-banner-slong-box,
.index-video-box,
.index-video,
.index-video-bg{
     height: 100vh;
}
.index-banner{
    width: 100%;
    height: 100%;
    display: block;
    position: relative;
}
.index-banner-img{
    width: 100%;
    display: block;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}
.index-banner-list{
    width: 100%;
    display: block;

}
.index-banner-mask{
    width: 100%;
    height: 100vh;
    display: block;
    background-repeat: repeat;
    background-position: top;
    background-image: url('../img/repeatBg.png');
    position: absolute;
    top: 0;
    z-index: 5;
    opacity: 0.4;
}
.index-banner-mask2{
    width: 100%;
    height: 100%;
    display: block;
    position: absolute;
    background-color: #000;
    opacity: 0.1;
    top: 0;

}
.index-banner-slong-box{
    display: block;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;    
    z-index: 9;
}
.index-banner-slong-list{
    display: block;
    width: 100%;
    height: 100%;
}
.index-banner-slong,
.index-video-slong{
    width: 100%;
    text-align: center;
    font-size: 36px;
    color: #FFF;
    display: block;
    position: absolute;
    z-index: 9;
    top: 48%;
    text-shadow: rgba(0,0,0,0.6) 2px 2px 2px;
    cursor: context-menu;
}



.index-video-box{
    width: 100%;
    display: block;
    position: relative;
}
.index-video{
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 5;
    display: block;
}
.index-banner-slong,
.index-video-slong{
    width: 100%;
    text-align: center;
    font-size: 34px;
    letter-spacing: 2px;
    color: #ffda45;
    display: block;
    position: absolute;
    z-index: 9;
    top: 45%;
    cursor: context-menu;
}
.index-video-bg{
    width: 100%;
    height: 100%;
    display: block;
    position: absolute;
    z-index: 1;
    top: 0;
    left: 0;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

.banner-arrow{
    width: 30px;
    max-width: 100%;
    display: block;
    position: absolute;
    bottom: 2%;
    left: calc(50% - 15px);
    z-index: 9;
}
.line-link{
    width: 50px;
    max-width: 100%;
    display: none;
    position: fixed;
    z-index: 99;
    left: 0;
    bottom: 48%;
}